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Finding the Fourth Proportional to 704.07, 971.61 and 393.57

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Solution

The fourth proportional to 704.07, 971.61 and 393.57 is: 543.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    704.07 : 971.61 = 393.57 : x
  2. Step 2: Convert to fraction form
    704.07/971.61 = 393.57/x
  3. Step 3: Cross multiply
    704.07x = 971.61 × 393.57
  4. Step 4: Simplify right side
    704.07x = 382,396.55
  5. Step 5: Solve for x
    x = 382,396.55/704.07
  6. Step 6: Final answer
    x = 543.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.